Answer:
1. the tissues around the lungs. through the mouth and nose 2. your bodys red blood cells bind with the virus allowing it to attach to your cells and infect 3. im not sure i think its chromosones 4. the vaci=cines build up your immunity to it by introducing it into your body
Explanation:
you can copy and paste dont add your reference. on question 3 they hAVEW TO ACCEPT EVEN IF IT SAYS IM NOT SURE. I DOUBLE CHECKED MY MAN
